1#!/usr/bin/perl 2# 3# headers_install prepare the listed header files for use in 4# user space and copy the files to their destination. 5# 6# Usage: headers_install.pl readdir installdir arch [files...] 7# readdir: dir to open files 8# installdir: dir to install the files 9# arch: current architecture 10# arch is used to force a reinstallation when the arch 11# changes because kbuild then detect a command line change. 12# files: list of files to check 13# 14# Step in preparation for users space: 15# 1) Drop all use of compiler.h definitions 16# 2) Drop include of compiler.h 17# 3) Drop all sections defined out by __KERNEL__ (using unifdef) 18 19use strict; 20use warnings; 21 22my ($readdir, $installdir, $arch, @files) = @ARGV; 23 24my $unifdef = "scripts/unifdef -U__KERNEL__"; 25 26foreach my $file (@files) { 27 my $tmpfile = "$installdir/$file.tmp"; 28 open(my $infile, '<', "$readdir/$file") 29 or die "$readdir/$file: $!\n"; 30 open(my $outfile, '>', "$tmpfile") or die "$tmpfile: $!\n"; 31 while (my $line = <$infile>) { 32 $line =~ s/([\s(])__user\s/$1/g; 33 $line =~ s/([\s(])__force\s/$1/g; 34 $line =~ s/([\s(])__iomem\s/$1/g; 35 $line =~ s/\s__attribute_const__\s/ /g; 36 $line =~ s/\s__attribute_const__$//g; 37 $line =~ s/^#include <linux\/compiler.h>//; 38 printf $outfile "%s", $line; 39 } 40 close $outfile; 41 close $infile; 42 system $unifdef . " $tmpfile > $installdir/$file"; 43 unlink $tmpfile; 44} 45exit 0; 46